--- /dev/null
+/*
+ Copyright (C) 2010 by Juan Carlos Torres <jucato@kdemail.net>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of
+ the License or (at your option) version 3 or any later version
+ accepted by the membership of KDE e.V. (or its successor appro-
+ ved by the membership of KDE e.V.), which shall act as a proxy
+ defined in Section 14 of version 3 of the license.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see http://www.gnu.org/licenses/.
+*/
+
+
+#ifndef CAMERA_H
+#define CAMERA_H
+
+#include <QtCore/QObject>
+#include <QtCore/QString>
+#include <QtCore/QList>
+#include <QtDBus/QDBusArgument>
+
+struct buffer
+{
+ void* start;
+ size_t length;
+};
+
+struct Property
+{
+ QString name;
+ bool added;
+ bool removed;
+};
+
+const QDBusArgument& operator<<(QDBusArgument& arg, const Property& change);
+const QDBusArgument& operator>>(QDBusArgument& arg, const Property& change);
+
+/**
+ * @brief Qt-based class for accessing the N900 camera and flash LEDs
+ *
+ * This class provides easy access to the N900's camera and flash LED
+ * functionality, specifically initializing the camera and controlling
+ * the LED torch and flash modes. It also reports on the status of
+ * the camera shutter.
+ *
+ */
+// TODO: Implement torch functionality
+class Camera : public QObject
+{
+ Q_OBJECT
+
+ public:
+ /**
+ * Error codes for easier error message handling
+ */
+ enum ErrorCode
+ {
+ NoError = 0, /**< No error */
+ GenericError = -1 /**< Generic Error */
+ };
+
+ Camera(QObject* parent = 0);
+ ~Camera();
+
+ /**
+ * Opens a character device connected to the camera
+ * and gets a file descriptor.
+ *
+ * @param device Device name, normally /dev/video0
+ * @return @c int Identifying the file descriptor
+ * @return @c int -1 Of opening the device was unsuccessful
+ */
+ static int open(char* device);
+
+ /**
+ * Closes the character device connected to the camera.
+ *
+ * @return @c int 0 If closing the device was successful
+ * @return @c int -1 If closing the device was unsuccessful
+ */
+ int close();
+
+ /**
+ * Initializes the camera. This specifically does the following:
+ * @li Get and set the cropping properties
+ * @li Set the camera data format
+ * @li Allocate memory-mapped buffers
+ *
+ * @return @c int 0 If initialization was successful
+ * @return @c int -1 If initialization was unsuccessful
+ */
+ int init();
+
+ /**
+ * Deinitializes the camera, freeing any allocated memory
+ * used during initialization.
+ *
+ * @return @c int 0 If deinitialization was successful
+ * @return @c int -1 If deinitialization was unsuccessful
+ */
+ int deinit();
+
+ /**
+ * Returns the current set flash intensity. This
+ * is different from the torch intensity used in
+ * torch modes.
+ *
+ * @return @c int The current flash intensity
+ */
+ int flashIntensity() const;
+
+ /**
+ * Returns the strobe timeout. Used only in strobe mode.
+ *
+ * @return @c quint32 Current timeout in microseconds
+ */
+ quint32 timeout() const;
+
+ /**
+ * Convenience function to create a D-Bus connection
+ * to listen for changes in the camera shutter status.
+ */
+ void registerDbusWatcher();
+
+ /**
+ * Function to manually query the status of the camera
+ * shutter using D-Bus and HAL.
+ *
+ * @return @c true If the camera shutter is open
+ * @return @c false If the camera shutter is closed
+ */
+ bool isShutterOpen() const;
+
+ public slots:
+
+ /**
+ * Starts or stops camera data streaming. Used to block
+ * and unblock the camera while using the flash.
+ *
+ * @param stream Whether streaming is on (@c true) or off (@c false)
+ *
+ * @return @c int 0 If starting or stopping the stream was successful
+ * @return @c int 1 If starting or stopping the stream was unsuccessful
+ */
+ int stream(bool stream);
+
+ /**
+ * Flash the LED in strobe mode. This will only flash
+ * the LED once. Repetition must be controlled by the
+ * client of this class.
+ *
+ * @return @c int 0 If strobing was successful
+ * @return @c int -1 If strobing was unsuccessful
+ */
+ int strobe();
+
+ /**
+ * Sets the intensity of the LED in flash mode.
+ *
+ * @param intensity intensity in mA. Valid values range
+ * from 215 to 500 only
+ *
+ * @return @c int 0 If setting the flash intensity was successful
+ * @return @c int -1 If setting the flash intensity was unsuccessful
+ */
+ int setFlashIntensity(int intensity);
+
+ /**
+ * Sets the strobe timeout. Used only in strobe mode.
+ *
+ * @param timeout Timeout in microseconds. Valid values range
+ * from 54600 to 820000 only
+ */
+ int setTimeout(quint32 timeout);
+
+ /**
+ * Slot that is called when the camera shutter status
+ * changes, that is, when it is opened or closed. Internally
+ * calls @ref isShutterOpen() to get the current shutter
+ * status and emits the @ref shutterStateChanged() signal.
+ *
+ * @param numUpdates Unused parameter to match the signal signature
+ * @param updates Unused parameter to match the signal signature
+ */
+ void shutterPropertyModified(int numUpdates, QList<Property> updates);
+
+ signals:
+ /**
+ * Signal to notify change in the camera shutter status.
+ * Users of this class should connect to this to monitor
+ * the shutter state.
+ *
+ * @param open Determines whether the shutter is open (@c true)
+ * or closed (@c false).
+ */
+ void shutterStateChanged(bool open);
+
+ private:
+ static char m_deviceName[15];
+ static int m_fd;
+
+ quint32 m_numBuffers;
+ struct buffer* m_buffers;
+
+};
+
+#endif
projects / flashstrobe / blobdiff